Matt Murdock and Clint Barton ended up tracking down the same bad guy, once. (The bad guy threw an EMP and shorted out Clint’s hearing aids. Matt had to talk to Clint entirely through vague hand gestures.
MCU Headcanons: Clint cleaned out a bar playing darts but was so drunk when he did it that the next morning he couldn't remember where the money came from. Each of the Avengers had a different story to explain it, but Cap told him the truth.
Bland Marvel Headcanon J. has his own taste in music that is separate from anything Tony has even programmed into him. He enjoys heavy dubstep. It drives Tony insane that he doesn’t prefer classic rock.